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usb: dwc2: host: Add scheduler tracing

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In preparation for future changes to the scheduler let's add some
tracing that makes it easy for us to see what's happening.  By default
this tracing will be off.

By changing "core.h" you can easily trace to ftrace, the console, or
nowhere.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
This commit is contained in:
Douglas Anderson
2016-01-28 18:19:58 -08:00
committed by Felipe Balbi
parent c9c8ac0150
commit 74fc4a7558
4 changed files with 53 additions and 2 deletions
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5
drivers/usb/dwc2/hcd.h
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@@ -563,6 +563,11 @@ static inline u16 dwc2_frame_num_inc(u16 frame, u16 inc)
return (frame + inc) & HFNUM_MAX_FRNUM;
}
static inline u16 dwc2_frame_num_dec(u16 frame, u16 dec)
{
return (frame + HFNUM_MAX_FRNUM + 1 - dec) & HFNUM_MAX_FRNUM;
}
static inline u16 dwc2_full_frame_num(u16 frame)
{
return (frame & HFNUM_MAX_FRNUM) >> 3;